Results 21 to 30 of about 3,039 (204)

Measurement of T1 of the ultrashort T2* components in white matter of the brain at 3T. [PDF]

, 2013
Recent research demonstrates that white matter of the brain contains not only long T2 components, but a minority of ultrashort T2* components. Adiabatic inversion recovery prepared dual echo ultrashort echo time (IR-dUTE) sequences can be used to ...
Bydder, Graeme M, Carl, Michael, Chen, Jun, Corey-Bloom, Jody, Du, Jiang, He, Qun, Sheth, Vipul   +6 more
core   +7 more sources

Bicomponent Mapping of Cortical Bone Using a New Interleaved UTE Imaging Sequence. [PDF]

Magn Reson Med
ABSTRACT Purpose Ultrashort echo time (UTE) MRI enables direct imaging of cortical bone and quantification of its water compartments via bicomponent T2* modeling. However, conventional approaches require multiple separate dual‐echo scans due to limitations in gradient power. This approach is prone to inter‐scan inconsistencies such as motion and signal
Shin SH, Athertya JS, Suprana A, Lo J, Wang J, Moazamian D, Chapelin F, Ma Y.   +7 more
europepmc   +2 more sources

Ultrashort echo time magnetization transfer (UTE‐MT) imaging of cortical bone [PDF]

NMR in Biomedicine, 2015
Magnetization transfer (MT) imaging is one way to indirectly assess pools of protons with fast transverse relaxation. However, conventional MT imaging sequences are not applicable to short T2 tissues such as cortical bone. Ultrashort echo time (UTE) sequences with TE values as low as 8 µs can detect signals from different water components in cortical ...
Chang, EY, Bae, WC, Shao, H, Biswas, R, Li, S, Chen, J, Patil, S, Healey, R, D'Lima, DD, Chung, CB, Du, J   +10 more
openaire   +5 more sources

An Update in Qualitative Imaging of Bone Using Ultrashort Echo Time Magnetic Resonance

Frontiers in Endocrinology, 2020
Bone is comprised of mineral, collagenous organic matrix, and water. X-ray-based techniques are the standard approach for bone evaluation in clinics, but they are unable to detect the organic matrix and water components in bone.
Saeed Jerban, Douglas G. Chang, Yajun Ma, Hyungseok Jang, Eric Y. Chang, Eric Y. Chang, Jiang Du   +6 more
doaj   +1 more source

Theoretical analysis and optimization of ultrashort echo time (UTE) imaging contrast with off-resonance saturation. [PDF]

Magn Reson Imaging, 2018
Off-resonance saturation (ORS) is a tool which can be used in ultrashort echo time (UTE) magnetic resonance imaging to selectively reduce short T2 signals. When these ORS prepared UTE images are subtracted from a non-suppressed UTE acquisition, the short T2 signals are highlighted.
Carl M, Ma Y, Du J.
europepmc   +6 more sources

DREAMER: Rapid and Simultaneous Multiple Contrast Magnetic Resonance Imaging of Solid and Soft Tissue. [PDF]

Magn Reson Med
ABSTRACT Purpose Pediatric craniofacial imaging may involve examination of both the skull and brain tissues via CT and MRI, respectively. DREAMER (Dual Repetition and Echo Acquisition with Multi‐contrast Encoding and Reconstruction) simultaneously acquires solid‐ and soft‐tissue images, potentially providing a rapid, high‐resolution, and radiation‐free
Vu BD, Kamona N, Wehrli FW, Deshpande RS, Song HK, Hu A, Baccaglini E, Bartlett SP, Rajapakse CS.   +8 more
europepmc   +2 more sources

Whole-Brain Myelin Imaging Using 3D Double-Echo Sliding Inversion Recovery Ultrashort Echo Time (DESIRE UTE) MRI [PDF]

Radiology, 2020
Background Signal contamination from long T2 water is a major challenge in direct imaging of myelin with MRI. Nulling of the unwanted long T2 signals can be achieved with an inversion recovery (IR) preparation pulse to null long T2 white matter within the brain. The remaining ultrashort T2 signal from myelin can be detected with an ultrashort echo time
Ya-Jun Ma, Adam C. Searleman, Hyungseok Jang, Jonathan Wong, Eric Y. Chang, Jody Corey-Bloom, Graeme M. Bydder, Jiang Du   +7 more
openaire   +2 more sources

Accelerated Stack-of-Spirals Free-Breathing Three-Dimensional Ultrashort Echo Time Lung Magnetic Resonance Imaging: A Feasibility Study in Patients With Breast Cancer

Frontiers in Oncology, 2021
PurposeTo investigate the clinical feasibility of accelerated free-breathing stack-of-spirals (spiral) three-dimensional (3D) ultrashort echo time (UTE) lung magnetic resonance imaging (MRI) using iterative self‐consistent parallel imaging reconstruction
Min Jae Cha, Hye Shin Ahn, Hyewon Choi, Hyun Jeong Park, Thomas Benkert, Josef Pfeuffer, Mun Young Paek   +6 more
doaj   +1 more source

Simultaneous Quantitative Susceptibility Mapping of Articular Cartilage and Cortical Bone of Human Knee Joint Using Ultrashort Echo Time Sequences

Frontiers in Endocrinology, 2022
BackgroundIt is of great clinical importance to assess the microstructure of the articular cartilage and cortical bone of the human knee joint. While quantitative susceptibility mapping (QSM) is a promising tool for investigating the knee joint, however,
Ming Zhang, Zhihui Li, Hanqi Wang, Tongtong Chen, Yong Lu, Fuhua Yan, Yuyao Zhang, Hongjiang Wei   +7 more
doaj   +1 more source

Temperature Mapping During MR-Guided Cryoablation Using a FLORET UTE Sequence. [PDF]

Magn Reson Med
ABSTRACT Purpose To implement a three‐dimensional FLORET‐UTE sequence for rapid MR thermometry during cryoablation and to validate voxel‐wise temperature maps against fiber‐optic probes in ex vivo bovine liver. Methods A FLORET‐UTE trajectory (TE 50 μs, 1.6 mm isotropic, 18 s/volume) was executed on a 3 T scanner while dry‐ice cryoablation was applied ...
Gutt M, Belker O, Scheller J, Schröer S, Wacker F, Hensen B, Gutberlet M.   +6 more
europepmc   +2 more sources